#66641D
Closest named color: Greeny Brown (#696006). oklch(49.1% 0.091 107.7), rgb(102, 100, 29).
Aa
White text reads best on this color (6.16:1).
About this color
#66641D is a medium-dark, moderately saturated brown. In OKLCH its lightness is 49%, its chroma 0.091 and its hue 108°. Its hue sits on the warm side of the wheel. The nearest named color is Greeny Brown (#696006), ΔE 0.014 away. White text reads best on it, at 6.16:1.
| Hue family | Browns |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.091) |
| Temperature | warm |
| Nearest name | Greeny Brown (#696006) |
| Black text | 3.40:1 |
| White text | 6.16:1 |
Values
| HEX | #66641D |
| RGB | rgb(102, 100, 29) |
| HSL | hsl(58, 56%, 26%) |
| OKLCH | oklch(49.1% 0.091 107.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #66641D | 6.16:1 | AA | Lc -85.8 | Fine for body text |
| Black text on #66641D | 3.40:1 | AA large text | Lc 23.4 | Dividers and decoration only |
| #66641D text on white | 6.16:1 | AA | Lc 80.7 | Fine for body text |
| #66641D text on black | 3.40:1 | AA large text | Lc -21.2 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 700.
-
Step 50
50
#F6F6F1
oklch(97.2% 0.007 106.5)
-
Step 100
100
#EAEBE1
oklch(93.7% 0.013 111.3)
-
Step 200
200
#DADBC8
oklch(88.5% 0.026 109.4)
-
Step 300
300
#C3C3A3
oklch(80.9% 0.043 107.3)
-
Step 400
400
#A5A470
oklch(70.7% 0.071 107.1)
-
Step 500
500
#8F8E4A
oklch(63.2% 0.09 108)
-
Step 600
600
#79772B
oklch(55.5% 0.097 107.8)
-
Step 700
700 (this color)
#66641D
oklch(49.1% 0.091 107.7)
-
Step 800
800
#53521B
oklch(42.7% 0.075 108.2)
-
Step 900
900
#45441C
oklch(37.8% 0.059 107.6)
-
Step 950
950
#282811
oklch(27% 0.038 108.7)
#66641D with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #6D6012 | 0.015 |
| Deuteranopia (no green cones) | #6E6322 | 0.015 |
| Tritanopia (no blue cones) | #6E5D56 | 0.083 |
| Achromatopsia (no color) | #616161 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #66641D
#66641D
oklch(49.1% 0.091 107.7)
- #5E5891
#5E5891
oklch(49.1% 0.09 287.4)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #66641D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Brown #696006 ΔE 0.014
- Mud Green #606602 ΔE 0.021
- Mud #735C12 ΔE 0.029
- Dark Moss Green #606C38 ΔE 0.029
- Camo Green #526525 ΔE 0.029
- Dark Olive Green #556B2F ΔE 0.029
- Brown Green #706C11 ΔE 0.031
- Browny Green #6F6C0A ΔE 0.032
Use #66641D in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.